Tool foe



UNITED STATES PATENT OFFICE.

SAMUEL GREEN, OF LYNN, MASSACHUSETTS.

TOOL FOR FIGURING- MOROCCO.

Specification of Letters Patent No. 14,534, dated March 25, 1856.

To all whom t may concern.'

Be it known that I, SAMUEL GREEN, of l agate, flint or other similar silicious materi-V als, instead of wood. The above materials have long been used for polishing and glazing leather` with plain-faced tools, but never before have f figuring or creased too-ls, been made of them, wood being the only material hitherto in use for this latter purpose, an entire-ly differentI branch from polishing or glazing. That my new application of these materials for figuring tools, constitutes a very great and valuable improvement in the art of figuring leather, will be obvious at a glance. In the iirst place, the hardness and durability of vmy figuring tool render it vastly cheaper than wooden tools,-one agate tool lasting longer than hundreds of wood. In the second place, it is not only vastly cheaper, but it also does the work in a much superior manner to that in which it can be done by any other figuring tool ever before invented. Wooden. tools, for figuring, are very liable, at the outset, to be marred, flattened down, or broken off, by passing over a hard place or'edge of a skin, so as to render the threads either entirely unfit for use, or very imperfeet in their operation. More especially is this apt to be the case with wooden tools when used in a machine. Again, when newly cut, a wooden tool is apt tofbe too sharp; very soon, however, if not entirely broken off, the threads become too flat and dull.

Now, with a tool of agate, flint, or other similar silicious substances, all the above inconveniences and defects are entirely obviated. Made right, in the first place, my figuring tool will remain so for a long time, I think, for years in constant use, doing the most uniform and perfect work, with no liability of getting out of order, and needing no repair.

I do not confine myself to tools of any particular shape or size. The ligure represents a perspective of the kind I prefer. It is also obvious that the threads may, as represented in the figure, be half coarse and half fine, for producing a split-figure by one operation, or they may be all alike.

The agate, glass, flint or other similarsilicious material, (I` prefer agate to" any other), is first shaped and smoothed, likea polishing tool; the threads are then cut, or rather ground in, by means of a copper tool, oil and emery. This (copper) tool may be turned out of a solid cylinder, or formed by putting on a mandrel, thin wheels of copper kept the proper distance apartby thin washers of less diameter. This is made to revolve in a lat-he, while the figuring tooly is held against it. Or, the copper tool may be stationary, and the material, to be cut, made to revolve.

What I claim as my invention and desire to secure by Letters Patent, ish

Making figuring tools for leather, of agate, glass, Hint, or other similar silicious materials, substantially as described.

SAMUEL GREEN 

